Originally Posted by
Marcus_Ti
Have you noticed that if you have a friend hold your rear wheel up, you spin the cranks and get the wheel going as fast as the highest gear will allow....the bike doesn't "jump" around in his hand?
Like I said. Pendulums. They are a thing. In a stand driving a wheel hard you excite one.
With the out of balance wheel I had, it definitely would jump around. You could also just hold the wheel in your hands or put it in a truing stand and spin it, and the spinning wheel would make clear that it was a spinning thing with a center of gravity outside its axis of rotation.